Rhetorical question, of course, but I have checked out the DU, Kos, and Mydd and naturally they're all quite enthusiastic about his candidacy. But I also checked out sites where the Democrats are quite knowledgeable and they're worried about him running. They seem worried about Mfume running costing them this seat and want Van Hollen to run and beat him.
Of course, your prediction may turn out to be correct or turn out like your Castor vs. Martninez prediction.
LOL. I think that prediction was on election night, when I underestimated the Kerry-Martinez voters in Cuban precincts. That turned to be wrong within a couple of hours. It happens, although to be fair to myself, rarely. :) Mfume is a very engaging and articulate personality, with quite a life history. He will be hard to beat, particularly for a federal office. The Red Blue divide when it comes to senate seats is becoming more and more impermeable, particularly as the stake rise as to who gets on the federal court.